Fix Hosts Page Apps Tag Parsing

[cryptoquick]

• CHANGELOG.md updated with a link to the PR (not the Issue)
• Rebased/mergable
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Connect #2255

The problem

The tag parseTag regex was written to parse out key/values, but sometimes tags come back from Influx without a value. This results in a null match, and kills Hosts Page Apps listing functionality.

The Solution

Add a null guard to tag parsing function to prevent parsing values that don't match tag RegEx.